Ed,
My load data is all in storage right now. We sold our house in Washington and moved to Alaska and are in the process of buying a house here. However, most of my fun stuff is all packed away while we are stuck in this tiny lttle apartment.
As far as bullets go I can give those from memory. Beartooth has a 280 grain WLNGC that is a great bullet. Penn has a 295 grain TC, no gas check. Liberty has a 270 grain and a 275 grain in different configurations and Cast Performance has a 250 and 265 grain bullet. BRP also has a beautiful 260 grain SWC, probably one of the prettiest cast bullets I ever saw. Beartooth has a web site and forum although I don't know the web address off the top of my bald head. The phone numbers for the various companies are as follows; (these are from a 2001 Gun Digest)
Beartooth 208-448-1865
BRP 719-633-0658
Cast Performance 307-856-4347
Liberty 503-640-5518
Penn PO Box 756, Indianola, PA 15051 (no phone # listed)
I hope this helps. I never found any 41 bullets over 300 grains. That Penn 295 grain was very accurate out of my Ruger and was the bullet Hodgdon used to develop their 41 mag heavy bullet data for the No. 26 manual. Good luck. Mart